lhn spinny fix

Clean up of spinner (repositioning, removing style attribute
By the way, the spinner inside this div gets overwritten by [quick_search_controller.js#L998](https://github.com/reciprocity/ggrc-core/blob/develop/src/ggrc/assets/javascripts/controllers/quick_search_controller.js#L998), so the these extra styles get applied as well: [quick_search_controller.js#L642](https://github.com/reciprocity/ggrc-core/blob/develop/src/ggrc/assets/javascripts/controllers/quick_search_controller.js#L642).